Samsung Display Co., Ltd.

Korea Advanced Institute of Science and Technology

Sangwoo Choi

Jung-taek Kim

Hoon Sohn

Minsang Koo

Sanghyuk Kwon

Soonkyu Hwang

Jiho Park

Eunchul Shin

Woojin Jung

An apparatus for inspecting a display panel for defects includes a table which supports the display panel, a laser excitation unit that irradiates a non-display area of the display panel with a point laser beam, a thermal wave detecting unit that generates thermal wave images of irradiated portions of the non-display area, a driving unit, and a control unit. A groove corresponding to an edge of the display panel may be defined in a top surface of the table. A defect, such as a crack, may be detected by comparing a defect pattern obtained from the thermal wave images with a pre-registered defect pattern.

Apparatus for inspecting a display panel for defects

A display device includes a display panel including a gate driving circuit which drives gate lines, a data driving circuit which drives data lines based on an image data signal and a driving reference voltage, and a driving controller which controls the gate driving circuit in response to an image signal and a control signal and provides the image data signal and the driving reference voltage to the data driving circuit. The driving controller generates a data enable signal having a display section and a blank section in one frame based on the control signal, and when a difference between a time length of the blank section of a current frame and a time length of the blank section of a previous frame is greater than a reference value, changes the driving reference voltage to a voltage level corresponding to a current frame frequency.

Display device capable of changing frame frequency and driving method thereof

Growing community of inventors

Cheonan-si, South Korea

Sangwoo Choi